3.5" in the front is asking for problems.
2.5" spacer you might have issues with ball joints popping out.
2" spacer or bilstein 5100's would be a safer bet. i personally wouldnt run a spacer though.
This is the general consensus of the forum. And I am NOT telling you it is wrong. I'm not advising anything either. But what I can tell you is facts.
My truck has a 2.5" / .75" F/R Spacer kit from Rough Country (What a PITA to install), but the truck is fine.. It rides fine, it aligned fine, and the suspension techs had nothing bad to say about the geometry at my local shop.
My Buddies truck is running a 3" front and 1.5" rear (I think thats the rear) spacer set off ebay on his 13' ram sport. His truck rides the same as mine, acts the same as mine, and his truck aligned as well.
I'm not saying were not going to wear parts down faster then others, but both of us have been on logging roads in 4wd without breaking anything.
Now... After all that reading, My front right strut is leaking, and I will replace my front spacer kit with bilstein 5100's now that I NEED to replace the strut. That was my original plan, but I got the spacer kit so cheap I couldn't pass it up.